Learn Beamline Guides APS 21-ID-G (LS-CAT)


The Advanced Photon Source
Argonne, IL
CATS Automounter

Sector 21 uses canted undulators to provide two independent sources for four ID end stations: 21-ID-D, 21-ID-E, 21-ID-F, and 21-ID-G. All four stations can be used simultaneously and independently. All four stations can be used simultaneously and independently. The 21-ID-D station supports macromolecular crystallography, SAD and MAD phasing over a wide energy range from 6.5 keV to 20 keV. All LS-CAT experimental stations are equipped with MD-2 diffractometers with state-of-the-art features such as on-axis sample viewing with precision zoom, automatic sample alignment, omega/kappa/phi motions, and a tuned piezoelectric fast shutter.1

CATS Sample Changer: SPINE or ACTOR pucks



We recommend the following tools for their compatibility and ease-of-use.

Recommended Accepted
Puck Style SPINE or ACTOR
Mount/Loop Style Any
Rod Length 18mm/SPINE
Base Style B5-Reusable, B5
To purchase ACTOR pucks, please contact us.

Sample Preparation Kits

Convenient kits of compatible assemblies of MiTeGen recommended products

Beamline Sample Preparation Kits are available in 3 aperture size assortments based on your crystal sizes and include:

  • Assemblies of 100 Crystal Mounts, on 18 mm pins, available in the following assortment:
    • 20 x Dual-Thickness MicroLoops ™ LD  (5 each of 10, 20, 30 and 50 μm aperture sizes)
    • 40 x Dual-Thickness MicroMount ™ (10 each of 75, 100, 150 and 200 μm aperture sizes)
    • 20 x Dual-Thickness MicroLoops ™  (5 each of 300, 400, 500 and 600 μm aperture sizes)
    • 20 x MicroMeshes ™  (5 each of 10, 25, 50 and 25L μm aperture sizes)
  • Installed in 100 B5-R reusable bases or 100 regular bases
  • Packaged and stored in 5 MiTeGen base holders

Uni-puck Starter Kit 2 includes:

  • (7) Universal V-1 Pucks
  • (1) Double Puck Loading Dewar with Lid
  • (1) Puck Wand
  • (1) Puck Dewar Loading Tool
  • (1) Puck Separator Tools
  • (1) Shelved Puck Shipping Cane
  • (1) Bent Cryo-Tong
  • (1) Cryo Express Dry Shipper (CX100)
  • (1) Shipping case for CX100

*custom kits are available, contact MiTeGen with specific requests.

Order Beamline Kits